Önce Gerekli dependency leri https://start.spring.io/ sayfasından alıyoruz:
Thymeleaf
Spring Boot Dev Tools
Spring Web
Dizin Yapısı:
— pom.xml —-
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.5.6</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>login4</groupId>
<artifactId>login4</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>login4</name>
<description>Demo project for Spring Boot</description>
<url/>
<licenses>
<license/>
</licenses>
<developers>
<developer/>
</developers>
<scm>
<connection/>
<developerConnection/>
<tag/>
<url/>
</scm>
<properties>
<java.version>17</java.version>
<lombok.version>1.18.30</lombok.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<dependency>
<groupId>nz.net.ultraq.thymeleaf</groupId>
<artifactId>thymeleaf-layout-dialect</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.30</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Validation klasörünün üçünde PasswordMatch.java ve PasswordMatchValidator.java dosyalarını oluşturuyoruz.
— PasswordMatch.java —
package login4.login4.validation;
import jakarta.validation.Constraint;
import jakarta.validation.Payload;
import java.lang.annotation.*;
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {PasswordMatchValidator.class})
@Documented
public @interface PasswordMatch {
String message() default "Passwords don't match";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}—- PasswordMatchValidator.java —
package login4.login4.validation;
import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;
import login4.login4.model.LoginModel;
public class PasswordMatchValidator implements ConstraintValidator<PasswordMatch, LoginModel> {
@Override
public void initialize(PasswordMatch constraintAnnotation) {
}
@Override
public boolean isValid(LoginModel loginModel, ConstraintValidatorContext context) {
return loginModel.getPassword() != null &&
loginModel.getPassword().equals(loginModel.getConfirmPassword());
}
}—- LoginModel.java —
package login.login.model;
import jakarta.validation.constraints.Email;
import jakarta.validation.constraints.NotEmpty;
public class LoginModel {
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getConfirmPassword() {
return confirmPassword;
}
public void setConfirmPassword(String confirmPassword) {
this.confirmPassword = confirmPassword;
}
@NotEmpty(message = "Name is required")
private String name;
@NotEmpty(message = "Surname is required")
private String surname;
@Email(message = "Please provide a valid email address")
@NotEmpty(message = "Email cannot be empty")
private String email;
@NotEmpty(message = "Password is required")
private String password;
@NotEmpty(message = "Confirm password is required")
private String confirmPassword;
}
— LoginController.java —
package login.login.controller;
import jakarta.validation.Valid;
import login4.login4.model.LoginModel;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/login")
public class LoginController {
@GetMapping("/")
public String displayLoginPage(Model model) {
model.addAttribute("loginModel", new LoginModel());
return "loginForm"; // Changed from "LoginForm" to "login"
}
@PostMapping("/processLogin")
public String processLogin(@Valid @ModelAttribute("loginModel") LoginModel loginModel,
BindingResult result,
Model model) throws Exception {
// Check for validation errors
if (result.hasErrors()) {
return "loginForm";
}
// Check password match
if (!loginModel.getPassword().equals(loginModel.getConfirmPassword())) {
result.rejectValue("confirmPassword", "error.confirmPassword", "Passwords do not match");
return "loginForm";
}
// If everything is valid, proceed to results page
return "loginresults"; // Make sure this template exists
}
}
— LoginForm.html —
<!DOCTYPE html>
<html layout:decorate="layouts/defaultLayout" xmlns:th="http://www.thymeleaf.org" xmlns:layout="http://www.w3.org/1999/xhtml">
<body>
<h1 style="margin-left:7em">Login Page</h1>
<div class="container my-5" layout:fragment="content">
<div class="row">
<div class="col-md-6"> <!-- This makes it take up half the container width -->
<form th:action="@{/login/processLogin}" method="post" th:object="${loginModel}">
<!-- Global errors -->
<div th:if="${#fields.hasGlobalErrors()}" class="alert alert-danger">
<p th:each="err : ${#fields.globalErrors()}" th:text="${err}"></p>
</div>
<div class="mb-3">
<label for="name" class="form-label">Name</label>
<input th:field="*{name}" type="text" class="form-control" id="name">
<div class="text-danger" th:if="${#fields.hasErrors('name')}" th:errors="*{name}"></div>
</div>
<div class="mb-3">
<label for="surname" class="form-label">Surname</label>
<input th:field="*{surname}" type="text" class="form-control" id="surname">
<div class="text-danger" th:if="${#fields.hasErrors('surname')}" th:errors="*{surname}"></div>
</div>
<div class="mb-3">
<label for="email" class="form-label">E-mail</label>
<input th:field="*{email}" type="email" class="form-control" id="email">
<div class="text-danger" th:if="${#fields.hasErrors('email')}" th:errors="*{email}"></div>
</div>
<div class="mb-3">
<label for="password" class="form-label">Password</label>
<input th:field="*{password}" type="password" class="form-control" id="password">
<div class="text-danger" th:if="${#fields.hasErrors('password')}" th:errors="*{password}"></div>
</div>
<div class="mb-3">
<label for="confirmPassword" class="form-label">Confirm Password</label>
<input th:field="*{confirmPassword}" type="password" class="form-control" id="confirmPassword">
<div class="text-danger" th:if="${#fields.hasErrors('confirmPassword')}" th:errors="*{confirmPassword}"></div>
</div>
<button type="submit" class="btn btn-primary">Login</button>
</form>
</div>
</div>
</div>
</body>
</html>
— loginresults.html —
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Login Results</title>
<link href="/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container ml-0">
<br/><br/>
<h2>Login Results</h2><hr>
<p>Name: <span th:text="${loginModel.name}"></span></p>
<p>Surname: <span th:text="${loginModel.surname}"></span></p>
<p>E-mail: <span th:text="${loginModel.email}"></span></p>
<p>Password: <span th:text="${loginModel.password}"></span></p>
<p>Confirm Password: <span th:text="${loginModel.confirmPassword}"></span></p>
<form th:action="@{/login/}" method="get">
<button type="submit" class="btn btn-primary">Logout</button>
</form>
</div>
</body>
</html>
— commonFooter.html —-
<div th:fragment="header" xmlns:th="http://www.w3.org/1999/xhtml">
<nav class="navbar navbar-expand-lg bg-body-tertiary bg-primary" data-bs-theme="dark">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
Dropdown
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><hr class="dropdown-divider"></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link disabled" aria-disabled="true">Disabled</a>
</li>
</ul>
<form class="d-flex" role="search">
<input class="form-control me-2" type="search" placeholder="Search" aria-label="Search"/>
<button class="btn btn-outline-success" type="submit">Search</button>
</form>
</div>
</div>
</nav>
</div>—- defaultLayout.html —-
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" xmlns:layout="">
<head>
<meta charset="UTF-8">
<title>Login Page</title>
<link href="/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<!--header -->
<div th:replace="layouts/commonHeader :: header"> My header is that</div>
<!--content -->
<section layout:fragment="content">
<div> <p>This is Content</p></div>
</section>
<!--footer -->
<div th:replace="layouts/commonFooter :: footer"> My footer is that</div>
<script src="/js/bootstrap.bundle.min.js"></script>
</bod
</html>
— application.properties —
spring.application.name=login
server.port=2022
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.html
spring.thymeleaf.enabled=true
Login4Application.java dosyasını Run Ettirdiğimizde (Tetiklediğimizde) ve Tarayıcımızın URL kısmına http://localhost:2022/login/ yazdıktan sonra uygulamamız çalışır.
Deneme amaçlı password ve Confim password bilgilerini farklı girelim.
password ve Confim password bilgilerini aynı girersek;
Uygulamanın Github linki: https://github.com/ergunalper/Creating_Web_Apps_With_Spring_Boot